Various Types of Crawler-Mounted Cranes
Industrial wheel tractors during the 1920s, such as those built by Fordson and McCormick-Deering were quickly modified in order to be able to power a huge range of machines. For instance, half-swing cranes and shovels were made by some companies around the engine and power train of the tractor and the wheels became replaced by crawlers.
During the 1930s, crawler tractors came into widespread use. Immediately after, numerous manufacturers started manufacturing attachments for them, like various lifting equipment devices.
For instance, side-mounted booms were mainly utilized for pipe-laying where it gained its nickname the "pipelayer." These types of machinery are currently often utilized for attending to cleaning up railroad derailments. Due to their compact design, mobility and size, in addition to exceptional lifting capacity, these types of machines are great for this use. In addition, swing booms that mounted on top of the engine compartment also became available.
Crawler cranes are similar to the crawler tractor in that it travels along crawler tracks. These machinery can not move fast thanks to their intense weights. Typically, the crane is powered by one engine and may be controlled by 2 or more cable operated drums. The crawler cranes are available with a lattice boom or a telescopic arm that is easy to extend by utilizing hydraulics. The lattice boom needs to be assembled by hand by adding many sections.
Tower Cranes
Tower cranes are those found in large construction projects. These types of cranes are necessary to be erected and broken down on location. They need to be transported by truck each time they are relocated. These tower cranes are very tall. They allow construction crews to transport concrete building components or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system in order to push every new crane part up into place and thus, are self-erecting.